2 Unix SMB/CIFS implementation.
6 Copyright (C) Andrew Tridgell 2002
7 Copyright (C) Volker Lendecke 2004,2005
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * We fork a child per domain to be able to act non-blocking in the main
25 * winbind daemon. A domain controller thousands of miles away being being
26 * slow replying with a 10.000 user list should not hold up netlogon calls
27 * that can be handled locally.
32 #include "rpc_client/rpc_client.h"
33 #include "nsswitch/wb_reqtrans.h"
35 #include "../lib/util/select.h"
36 #include "../libcli/security/security.h"
37 #include "system/select.h"
39 #include "../lib/util/tevent_unix.h"
40 #include "lib/param/loadparm.h"
41 #include "lib/util/sys_rw.h"
42 #include "lib/util/sys_rw_data.h"
45 #define DBGC_CLASS DBGC_WINBIND
47 extern bool override_logfile
;
49 static struct winbindd_child
*winbindd_children
= NULL
;
51 /* Read some data from a client connection */
53 static NTSTATUS
child_read_request(int sock
, struct winbindd_request
*wreq
)
57 status
= read_data_ntstatus(sock
, (char *)wreq
, sizeof(*wreq
));
58 if (!NT_STATUS_IS_OK(status
)) {
59 DEBUG(3, ("child_read_request: read_data failed: %s\n",
64 if (wreq
->extra_len
== 0) {
65 wreq
->extra_data
.data
= NULL
;
69 DEBUG(10, ("Need to read %d extra bytes\n", (int)wreq
->extra_len
));
71 wreq
->extra_data
.data
= SMB_MALLOC_ARRAY(char, wreq
->extra_len
+ 1);
72 if (wreq
->extra_data
.data
== NULL
) {
73 DEBUG(0, ("malloc failed\n"));
74 return NT_STATUS_NO_MEMORY
;
77 /* Ensure null termination */
78 wreq
->extra_data
.data
[wreq
->extra_len
] = '\0';
80 status
= read_data_ntstatus(sock
, wreq
->extra_data
.data
,
82 if (!NT_STATUS_IS_OK(status
)) {
83 DEBUG(0, ("Could not read extra data: %s\n",
89 static NTSTATUS
child_write_response(int sock
, struct winbindd_response
*wrsp
)
94 iov
[0].iov_base
= (void *)wrsp
;
95 iov
[0].iov_len
= sizeof(struct winbindd_response
);
98 if (wrsp
->length
> sizeof(struct winbindd_response
)) {
99 iov
[1].iov_base
= (void *)wrsp
->extra_data
.data
;
100 iov
[1].iov_len
= wrsp
->length
-iov
[0].iov_len
;
104 DEBUG(10, ("Writing %d bytes to parent\n", (int)wrsp
->length
));
106 if (write_data_iov(sock
, iov
, iov_count
) != wrsp
->length
) {
107 DEBUG(0, ("Could not write result\n"));
108 return NT_STATUS_INVALID_HANDLE
;
115 * Do winbind child async request. This is not simply wb_simple_trans. We have
116 * to do the queueing ourselves because while a request is queued, the child
117 * might have crashed, and we have to re-fork it in the _trigger function.
120 struct wb_child_request_state
{
121 struct tevent_context
*ev
;
122 struct tevent_req
*queue_subreq
;
123 struct tevent_req
*subreq
;
124 struct winbindd_child
*child
;
125 struct winbindd_request
*request
;
126 struct winbindd_response
*response
;
129 static bool fork_domain_child(struct winbindd_child
*child
);
131 static void wb_child_request_waited(struct tevent_req
*subreq
);
132 static void wb_child_request_done(struct tevent_req
*subreq
);
133 static void wb_child_request_orphaned(struct tevent_req
*subreq
);
135 static void wb_child_request_cleanup(struct tevent_req
*req
,
136 enum tevent_req_state req_state
);
138 struct tevent_req
*wb_child_request_send(TALLOC_CTX
*mem_ctx
,
139 struct tevent_context
*ev
,
140 struct winbindd_child
*child
,
141 struct winbindd_request
*request
)
143 struct tevent_req
*req
;
144 struct wb_child_request_state
*state
;
145 struct tevent_req
*subreq
;
147 req
= tevent_req_create(mem_ctx
, &state
,
148 struct wb_child_request_state
);
154 state
->child
= child
;
155 state
->request
= request
;
157 subreq
= tevent_queue_wait_send(state
, ev
, child
->queue
);
158 if (tevent_req_nomem(subreq
, req
)) {
159 return tevent_req_post(req
, ev
);
161 tevent_req_set_callback(subreq
, wb_child_request_waited
, req
);
162 state
->queue_subreq
= subreq
;
164 tevent_req_set_cleanup_fn(req
, wb_child_request_cleanup
);
169 static void wb_child_request_waited(struct tevent_req
*subreq
)
171 struct tevent_req
*req
= tevent_req_callback_data(
172 subreq
, struct tevent_req
);
173 struct wb_child_request_state
*state
= tevent_req_data(
174 req
, struct wb_child_request_state
);
177 ok
= tevent_queue_wait_recv(subreq
);
183 * We need to keep state->queue_subreq
184 * in order to block the queue.
188 if ((state
->child
->sock
== -1) && (!fork_domain_child(state
->child
))) {
189 tevent_req_error(req
, errno
);
193 subreq
= wb_simple_trans_send(state
, server_event_context(), NULL
,
194 state
->child
->sock
, state
->request
);
195 if (tevent_req_nomem(subreq
, req
)) {
199 state
->subreq
= subreq
;
200 tevent_req_set_callback(subreq
, wb_child_request_done
, req
);
201 tevent_req_set_endtime(req
, state
->ev
, timeval_current_ofs(300, 0));
204 static void wb_child_request_done(struct tevent_req
*subreq
)
206 struct tevent_req
*req
= tevent_req_callback_data(
207 subreq
, struct tevent_req
);
208 struct wb_child_request_state
*state
= tevent_req_data(
209 req
, struct wb_child_request_state
);
212 ret
= wb_simple_trans_recv(subreq
, state
, &state
->response
, &err
);
213 /* Freeing the subrequest is deferred until the cleanup function,
214 * which has to know whether a subrequest exists, and consequently
215 * decide whether to shut down the pipe to the child process.
218 tevent_req_error(req
, err
);
221 tevent_req_done(req
);
224 static void wb_child_request_orphaned(struct tevent_req
*subreq
)
226 DBG_WARNING("cleanup orphaned subreq[%p]\n", subreq
);
230 int wb_child_request_recv(struct tevent_req
*req
, TALLOC_CTX
*mem_ctx
,
231 struct winbindd_response
**presponse
, int *err
)
233 struct wb_child_request_state
*state
= tevent_req_data(
234 req
, struct wb_child_request_state
);
236 if (tevent_req_is_unix_error(req
, err
)) {
239 *presponse
= talloc_move(mem_ctx
, &state
->response
);
243 static void wb_child_request_cleanup(struct tevent_req
*req
,
244 enum tevent_req_state req_state
)
246 struct wb_child_request_state
*state
=
247 tevent_req_data(req
, struct wb_child_request_state
);
249 if (state
->subreq
== NULL
) {
250 /* nothing to cleanup */
254 if (req_state
== TEVENT_REQ_RECEIVED
) {
255 struct tevent_req
*subreq
= NULL
;
258 * Our caller gave up, but we need to keep
259 * the low level request (wb_simple_trans)
260 * in order to maintain the parent child protocol.
262 * We also need to keep the child queue blocked
263 * until we got the response from the child.
266 subreq
= talloc_move(state
->child
->queue
, &state
->subreq
);
267 talloc_move(subreq
, &state
->queue_subreq
);
268 tevent_req_set_callback(subreq
,
269 wb_child_request_orphaned
,
272 DBG_WARNING("keep orphaned subreq[%p]\n", subreq
);
276 TALLOC_FREE(state
->subreq
);
277 TALLOC_FREE(state
->queue_subreq
);
279 if (req_state
== TEVENT_REQ_DONE
) {
280 /* transmitted request and got response */
285 * Failed to transmit and receive response, or request
286 * cancelled while being serviced.
287 * The basic parent/child communication broke, close
290 close(state
->child
->sock
);
291 state
->child
->sock
= -1;
292 DLIST_REMOVE(winbindd_children
, state
->child
);
295 struct winbindd_child
*choose_domain_child(struct winbindd_domain
*domain
)
297 struct winbindd_child
*shortest
= &domain
->children
[0];
298 struct winbindd_child
*current
;
301 for (i
=0; i
<lp_winbind_max_domain_connections(); i
++) {
302 size_t shortest_len
, current_len
;
304 current
= &domain
->children
[i
];
305 current_len
= tevent_queue_length(current
->queue
);
307 if (current_len
== 0) {
312 shortest_len
= tevent_queue_length(shortest
->queue
);
314 if (current_len
< shortest_len
) {
322 struct dcerpc_binding_handle
*dom_child_handle(struct winbindd_domain
*domain
)
324 struct winbindd_child
*child
;
326 child
= choose_domain_child(domain
);
327 return child
->binding_handle
;
330 struct wb_domain_request_state
{
331 struct tevent_context
*ev
;
332 struct winbindd_domain
*domain
;
333 struct winbindd_child
*child
;
334 struct winbindd_request
*request
;
335 struct winbindd_request
*init_req
;
336 struct winbindd_response
*response
;
339 static void wb_domain_request_gotdc(struct tevent_req
*subreq
);
340 static void wb_domain_request_initialized(struct tevent_req
*subreq
);
341 static void wb_domain_request_done(struct tevent_req
*subreq
);
343 struct tevent_req
*wb_domain_request_send(TALLOC_CTX
*mem_ctx
,
344 struct tevent_context
*ev
,
345 struct winbindd_domain
*domain
,
346 struct winbindd_request
*request
)
348 struct tevent_req
*req
, *subreq
;
349 struct wb_domain_request_state
*state
;
351 req
= tevent_req_create(mem_ctx
, &state
,
352 struct wb_domain_request_state
);
357 state
->child
= choose_domain_child(domain
);
359 if (domain
->initialized
) {
360 subreq
= wb_child_request_send(state
, ev
, state
->child
,
362 if (tevent_req_nomem(subreq
, req
)) {
363 return tevent_req_post(req
, ev
);
365 tevent_req_set_callback(subreq
, wb_domain_request_done
, req
);
369 state
->domain
= domain
;
371 state
->request
= request
;
373 state
->init_req
= talloc_zero(state
, struct winbindd_request
);
374 if (tevent_req_nomem(state
->init_req
, req
)) {
375 return tevent_req_post(req
, ev
);
378 if (IS_DC
|| domain
->primary
|| domain
->internal
) {
379 /* The primary domain has to find the DC name itself */
380 state
->init_req
->cmd
= WINBINDD_INIT_CONNECTION
;
381 fstrcpy(state
->init_req
->domain_name
, domain
->name
);
382 state
->init_req
->data
.init_conn
.is_primary
= domain
->primary
;
383 fstrcpy(state
->init_req
->data
.init_conn
.dcname
, "");
385 subreq
= wb_child_request_send(state
, ev
, state
->child
,
387 if (tevent_req_nomem(subreq
, req
)) {
388 return tevent_req_post(req
, ev
);
390 tevent_req_set_callback(subreq
, wb_domain_request_initialized
,
396 * Ask our DC for a DC name
398 domain
= find_our_domain();
400 /* This is *not* the primary domain, let's ask our DC about a DC
403 state
->init_req
->cmd
= WINBINDD_GETDCNAME
;
404 fstrcpy(state
->init_req
->domain_name
, domain
->name
);
406 subreq
= wb_child_request_send(state
, ev
, state
->child
, request
);
407 if (tevent_req_nomem(subreq
, req
)) {
408 return tevent_req_post(req
, ev
);
410 tevent_req_set_callback(subreq
, wb_domain_request_gotdc
, req
);
414 static void wb_domain_request_gotdc(struct tevent_req
*subreq
)
416 struct tevent_req
*req
= tevent_req_callback_data(
417 subreq
, struct tevent_req
);
418 struct wb_domain_request_state
*state
= tevent_req_data(
419 req
, struct wb_domain_request_state
);
420 struct winbindd_response
*response
;
423 ret
= wb_child_request_recv(subreq
, talloc_tos(), &response
, &err
);
426 tevent_req_error(req
, err
);
429 state
->init_req
->cmd
= WINBINDD_INIT_CONNECTION
;
430 fstrcpy(state
->init_req
->domain_name
, state
->domain
->name
);
431 state
->init_req
->data
.init_conn
.is_primary
= False
;
432 fstrcpy(state
->init_req
->data
.init_conn
.dcname
,
433 response
->data
.dc_name
);
435 TALLOC_FREE(response
);
437 subreq
= wb_child_request_send(state
, state
->ev
, state
->child
,
439 if (tevent_req_nomem(subreq
, req
)) {
442 tevent_req_set_callback(subreq
, wb_domain_request_initialized
, req
);
445 static void wb_domain_request_initialized(struct tevent_req
*subreq
)
447 struct tevent_req
*req
= tevent_req_callback_data(
448 subreq
, struct tevent_req
);
449 struct wb_domain_request_state
*state
= tevent_req_data(
450 req
, struct wb_domain_request_state
);
451 struct winbindd_response
*response
;
454 ret
= wb_child_request_recv(subreq
, talloc_tos(), &response
, &err
);
457 tevent_req_error(req
, err
);
461 if (!string_to_sid(&state
->domain
->sid
,
462 response
->data
.domain_info
.sid
)) {
463 DEBUG(1,("init_child_recv: Could not convert sid %s "
464 "from string\n", response
->data
.domain_info
.sid
));
465 tevent_req_error(req
, EINVAL
);
469 talloc_free(state
->domain
->name
);
470 state
->domain
->name
= talloc_strdup(state
->domain
,
471 response
->data
.domain_info
.name
);
472 if (state
->domain
->name
== NULL
) {
473 tevent_req_error(req
, ENOMEM
);
477 if (response
->data
.domain_info
.alt_name
[0] != '\0') {
478 talloc_free(state
->domain
->alt_name
);
480 state
->domain
->alt_name
= talloc_strdup(state
->domain
,
481 response
->data
.domain_info
.alt_name
);
482 if (state
->domain
->alt_name
== NULL
) {
483 tevent_req_error(req
, ENOMEM
);
488 state
->domain
->native_mode
= response
->data
.domain_info
.native_mode
;
489 state
->domain
->active_directory
=
490 response
->data
.domain_info
.active_directory
;
491 state
->domain
->initialized
= true;
493 TALLOC_FREE(response
);
495 subreq
= wb_child_request_send(state
, state
->ev
, state
->child
,
497 if (tevent_req_nomem(subreq
, req
)) {
500 tevent_req_set_callback(subreq
, wb_domain_request_done
, req
);
503 static void wb_domain_request_done(struct tevent_req
*subreq
)
505 struct tevent_req
*req
= tevent_req_callback_data(
506 subreq
, struct tevent_req
);
507 struct wb_domain_request_state
*state
= tevent_req_data(
508 req
, struct wb_domain_request_state
);
511 ret
= wb_child_request_recv(subreq
, talloc_tos(), &state
->response
,
515 tevent_req_error(req
, err
);
518 tevent_req_done(req
);
521 int wb_domain_request_recv(struct tevent_req
*req
, TALLOC_CTX
*mem_ctx
,
522 struct winbindd_response
**presponse
, int *err
)
524 struct wb_domain_request_state
*state
= tevent_req_data(
525 req
, struct wb_domain_request_state
);
527 if (tevent_req_is_unix_error(req
, err
)) {
530 *presponse
= talloc_move(mem_ctx
, &state
->response
);
534 static void child_process_request(struct winbindd_child
*child
,
535 struct winbindd_cli_state
*state
)
537 struct winbindd_domain
*domain
= child
->domain
;
538 const struct winbindd_child_dispatch_table
*table
= child
->table
;
540 /* Free response data - we may be interrupted and receive another
541 command before being able to send this data off. */
543 state
->response
->result
= WINBINDD_ERROR
;
544 state
->response
->length
= sizeof(struct winbindd_response
);
546 /* as all requests in the child are sync, we can use talloc_tos() */
547 state
->mem_ctx
= talloc_tos();
549 /* Process command */
551 for (; table
->name
; table
++) {
552 if (state
->request
->cmd
== table
->struct_cmd
) {
553 DEBUG(10,("child_process_request: request fn %s\n",
555 state
->response
->result
= table
->struct_fn(domain
, state
);
560 DEBUG(1, ("child_process_request: unknown request fn number %d\n",
561 (int)state
->request
->cmd
));
562 state
->response
->result
= WINBINDD_ERROR
;
565 void setup_child(struct winbindd_domain
*domain
, struct winbindd_child
*child
,
566 const struct winbindd_child_dispatch_table
*table
,
567 const char *logprefix
,
570 if (logprefix
&& logname
) {
571 char *logbase
= NULL
;
573 if (*lp_logfile(talloc_tos())) {
576 if (asprintf(&logbase
, "%s", lp_logfile(talloc_tos())) < 0) {
577 smb_panic("Internal error: asprintf failed");
580 if ((end
= strrchr_m(logbase
, '/'))) {
584 if (asprintf(&logbase
, "%s", get_dyn_LOGFILEBASE()) < 0) {
585 smb_panic("Internal error: asprintf failed");
589 if (asprintf(&child
->logfilename
, "%s/%s-%s",
590 logbase
, logprefix
, logname
) < 0) {
592 smb_panic("Internal error: asprintf failed");
597 smb_panic("Internal error: logprefix == NULL && "
602 child
->domain
= domain
;
603 child
->table
= table
;
604 child
->queue
= tevent_queue_create(NULL
, "winbind_child");
605 SMB_ASSERT(child
->queue
!= NULL
);
606 child
->binding_handle
= wbint_binding_handle(NULL
, domain
, child
);
607 SMB_ASSERT(child
->binding_handle
!= NULL
);
610 void winbind_child_died(pid_t pid
)
612 struct winbindd_child
*child
;
614 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
615 if (child
->pid
== pid
) {
621 DEBUG(5, ("Already reaped child %u died\n", (unsigned int)pid
));
625 /* This will be re-added in fork_domain_child() */
627 DLIST_REMOVE(winbindd_children
, child
);
630 if (child
->sock
!= -1) {
636 /* Ensure any negative cache entries with the netbios or realm names are removed. */
638 void winbindd_flush_negative_conn_cache(struct winbindd_domain
*domain
)
640 flush_negative_conn_cache_for_domain(domain
->name
);
641 if (domain
->alt_name
!= NULL
) {
642 flush_negative_conn_cache_for_domain(domain
->alt_name
);
647 * Parent winbindd process sets its own debug level first and then
648 * sends a message to all the winbindd children to adjust their debug
649 * level to that of parents.
652 void winbind_msg_debug(struct messaging_context
*msg_ctx
,
655 struct server_id server_id
,
658 struct winbindd_child
*child
;
660 DEBUG(10,("winbind_msg_debug: got debug message.\n"));
662 debug_message(msg_ctx
, private_data
, MSG_DEBUG
, server_id
, data
);
664 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
666 DEBUG(10,("winbind_msg_debug: sending message to pid %u.\n",
667 (unsigned int)child
->pid
));
669 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
672 strlen((char *) data
->data
) + 1);
676 /* Set our domains as offline and forward the offline message to our children. */
678 void winbind_msg_offline(struct messaging_context
*msg_ctx
,
681 struct server_id server_id
,
684 struct winbindd_child
*child
;
685 struct winbindd_domain
*domain
;
687 DEBUG(10,("winbind_msg_offline: got offline message.\n"));
689 if (!lp_winbind_offline_logon()) {
690 DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
694 /* Set our global state as offline. */
695 if (!set_global_winbindd_state_offline()) {
696 DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
700 /* Set all our domains as offline. */
701 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
702 if (domain
->internal
) {
705 DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain
->name
));
706 set_domain_offline(domain
);
709 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
710 /* Don't send message to internal children. We've already
712 if (!child
->domain
|| winbindd_internal_child(child
)) {
716 /* Or internal domains (this should not be possible....) */
717 if (child
->domain
->internal
) {
721 /* Each winbindd child should only process requests for one domain - make sure
722 we only set it online / offline for that domain. */
724 DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
725 (unsigned int)child
->pid
, child
->domain
->name
));
727 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
729 (const uint8_t *)child
->domain
->name
,
730 strlen(child
->domain
->name
)+1);
734 /* Set our domains as online and forward the online message to our children. */
736 void winbind_msg_online(struct messaging_context
*msg_ctx
,
739 struct server_id server_id
,
742 struct winbindd_child
*child
;
743 struct winbindd_domain
*domain
;
745 DEBUG(10,("winbind_msg_online: got online message.\n"));
747 if (!lp_winbind_offline_logon()) {
748 DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
752 /* Set our global state as online. */
753 set_global_winbindd_state_online();
755 smb_nscd_flush_user_cache();
756 smb_nscd_flush_group_cache();
758 /* Set all our domains as online. */
759 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
760 if (domain
->internal
) {
763 DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain
->name
));
765 winbindd_flush_negative_conn_cache(domain
);
766 set_domain_online_request(domain
);
768 /* Send an online message to the idmap child when our
769 primary domain comes back online */
771 if ( domain
->primary
) {
772 struct winbindd_child
*idmap
= idmap_child();
774 if ( idmap
->pid
!= 0 ) {
775 messaging_send_buf(msg_ctx
,
776 pid_to_procid(idmap
->pid
),
778 (const uint8_t *)domain
->name
,
779 strlen(domain
->name
)+1);
784 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
785 /* Don't send message to internal childs. */
786 if (!child
->domain
|| winbindd_internal_child(child
)) {
790 /* Or internal domains (this should not be possible....) */
791 if (child
->domain
->internal
) {
795 /* Each winbindd child should only process requests for one domain - make sure
796 we only set it online / offline for that domain. */
798 DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
799 (unsigned int)child
->pid
, child
->domain
->name
));
801 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
803 (const uint8_t *)child
->domain
->name
,
804 strlen(child
->domain
->name
)+1);
808 static const char *collect_onlinestatus(TALLOC_CTX
*mem_ctx
)
810 struct winbindd_domain
*domain
;
813 if ((buf
= talloc_asprintf(mem_ctx
, "global:%s ",
814 get_global_winbindd_state_offline() ?
815 "Offline":"Online")) == NULL
) {
819 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
820 if ((buf
= talloc_asprintf_append_buffer(buf
, "%s:%s ",
823 "Online":"Offline")) == NULL
) {
828 buf
= talloc_asprintf_append_buffer(buf
, "\n");
830 DEBUG(5,("collect_onlinestatus: %s", buf
));
835 void winbind_msg_onlinestatus(struct messaging_context
*msg_ctx
,
838 struct server_id server_id
,
844 DEBUG(5,("winbind_msg_onlinestatus received.\n"));
846 mem_ctx
= talloc_init("winbind_msg_onlinestatus");
847 if (mem_ctx
== NULL
) {
851 message
= collect_onlinestatus(mem_ctx
);
852 if (message
== NULL
) {
853 talloc_destroy(mem_ctx
);
857 messaging_send_buf(msg_ctx
, server_id
, MSG_WINBIND_ONLINESTATUS
,
858 (const uint8_t *)message
, strlen(message
) + 1);
860 talloc_destroy(mem_ctx
);
863 void winbind_msg_dump_event_list(struct messaging_context
*msg_ctx
,
866 struct server_id server_id
,
869 struct winbindd_child
*child
;
871 DEBUG(10,("winbind_msg_dump_event_list received\n"));
873 DBG_WARNING("dump event list no longer implemented\n");
875 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
877 DEBUG(10,("winbind_msg_dump_event_list: sending message to pid %u\n",
878 (unsigned int)child
->pid
));
880 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
887 void winbind_msg_dump_domain_list(struct messaging_context
*msg_ctx
,
890 struct server_id server_id
,
894 const char *message
= NULL
;
895 const char *domain
= NULL
;
898 struct winbindd_domain
*dom
= NULL
;
900 DEBUG(5,("winbind_msg_dump_domain_list received.\n"));
902 mem_ctx
= talloc_init("winbind_msg_dump_domain_list");
907 if (data
->length
> 0) {
908 domain
= (const char *)data
->data
;
913 DEBUG(5,("winbind_msg_dump_domain_list for domain: %s\n",
916 message
= NDR_PRINT_STRUCT_STRING(mem_ctx
, winbindd_domain
,
917 find_domain_from_name_noinit(domain
));
919 talloc_destroy(mem_ctx
);
923 messaging_send_buf(msg_ctx
, server_id
,
924 MSG_WINBIND_DUMP_DOMAIN_LIST
,
925 (const uint8_t *)message
, strlen(message
) + 1);
927 talloc_destroy(mem_ctx
);
932 DEBUG(5,("winbind_msg_dump_domain_list all domains\n"));
934 for (dom
= domain_list(); dom
; dom
=dom
->next
) {
935 message
= NDR_PRINT_STRUCT_STRING(mem_ctx
, winbindd_domain
, dom
);
937 talloc_destroy(mem_ctx
);
941 s
= talloc_asprintf_append(s
, "%s\n", message
);
943 talloc_destroy(mem_ctx
);
948 status
= messaging_send_buf(msg_ctx
, server_id
,
949 MSG_WINBIND_DUMP_DOMAIN_LIST
,
950 (uint8_t *)s
, strlen(s
) + 1);
951 if (!NT_STATUS_IS_OK(status
)) {
952 DEBUG(0,("failed to send message: %s\n",
956 talloc_destroy(mem_ctx
);
959 static void account_lockout_policy_handler(struct tevent_context
*ctx
,
960 struct tevent_timer
*te
,
964 struct winbindd_child
*child
=
965 (struct winbindd_child
*)private_data
;
966 TALLOC_CTX
*mem_ctx
= NULL
;
967 struct samr_DomInfo12 lockout_policy
;
970 DEBUG(10,("account_lockout_policy_handler called\n"));
972 TALLOC_FREE(child
->lockout_policy_event
);
974 if ( !winbindd_can_contact_domain( child
->domain
) ) {
975 DEBUG(10,("account_lockout_policy_handler: Removing myself since I "
976 "do not have an incoming trust to domain %s\n",
977 child
->domain
->name
));
982 mem_ctx
= talloc_init("account_lockout_policy_handler ctx");
984 result
= NT_STATUS_NO_MEMORY
;
986 result
= wb_cache_lockout_policy(child
->domain
, mem_ctx
,
989 TALLOC_FREE(mem_ctx
);
991 if (!NT_STATUS_IS_OK(result
)) {
992 DEBUG(10,("account_lockout_policy_handler: lockout_policy failed error %s\n",
996 child
->lockout_policy_event
= tevent_add_timer(server_event_context(), NULL
,
997 timeval_current_ofs(3600, 0),
998 account_lockout_policy_handler
,
1002 static time_t get_machine_password_timeout(void)
1004 /* until we have gpo support use lp setting */
1005 return lp_machine_password_timeout();
1008 static bool calculate_next_machine_pwd_change(const char *domain
,
1011 time_t pass_last_set_time
;
1017 pw
= secrets_fetch_machine_password(domain
,
1018 &pass_last_set_time
,
1022 DEBUG(0,("cannot fetch own machine password ????"));
1028 timeout
= get_machine_password_timeout();
1030 DEBUG(10,("machine password never expires\n"));
1034 tv
.tv_sec
= pass_last_set_time
;
1035 DEBUG(10, ("password last changed %s\n",
1036 timeval_string(talloc_tos(), &tv
, false)));
1037 tv
.tv_sec
+= timeout
;
1038 DEBUGADD(10, ("password valid until %s\n",
1039 timeval_string(talloc_tos(), &tv
, false)));
1041 if (time(NULL
) < (pass_last_set_time
+ timeout
)) {
1042 next_change
= pass_last_set_time
+ timeout
;
1043 DEBUG(10,("machine password still valid until: %s\n",
1044 http_timestring(talloc_tos(), next_change
)));
1045 *t
= timeval_set(next_change
, 0);
1047 if (lp_clustering()) {
1050 * When having a cluster, we have several
1051 * winbinds racing for the password change. In
1052 * the machine_password_change_handler()
1053 * function we check if someone else was
1054 * faster when the event triggers. We add a
1055 * 255-second random delay here, so that we
1056 * don't run to change the password at the
1057 * exact same moment.
1059 generate_random_buffer(&randbuf
, sizeof(randbuf
));
1060 DEBUG(10, ("adding %d seconds randomness\n",
1062 t
->tv_sec
+= randbuf
;
1067 DEBUG(10,("machine password expired, needs immediate change\n"));
1069 *t
= timeval_zero();
1074 static void machine_password_change_handler(struct tevent_context
*ctx
,
1075 struct tevent_timer
*te
,
1079 struct messaging_context
*msg_ctx
= server_messaging_context();
1080 struct winbindd_child
*child
=
1081 (struct winbindd_child
*)private_data
;
1082 struct rpc_pipe_client
*netlogon_pipe
= NULL
;
1083 struct netlogon_creds_cli_context
*netlogon_creds_ctx
= NULL
;
1085 struct timeval next_change
;
1087 DEBUG(10,("machine_password_change_handler called\n"));
1089 TALLOC_FREE(child
->machine_password_change_event
);
1091 if (!calculate_next_machine_pwd_change(child
->domain
->name
,
1093 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
1097 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
1098 timeval_string(talloc_tos(), &next_change
, false)));
1100 if (!timeval_expired(&next_change
)) {
1101 DEBUG(10, ("Someone else has already changed the pw\n"));
1105 if (!winbindd_can_contact_domain(child
->domain
)) {
1106 DEBUG(10,("machine_password_change_handler: Removing myself since I "
1107 "do not have an incoming trust to domain %s\n",
1108 child
->domain
->name
));
1112 result
= cm_connect_netlogon_secure(child
->domain
,
1114 &netlogon_creds_ctx
);
1115 if (!NT_STATUS_IS_OK(result
)) {
1116 DEBUG(10,("machine_password_change_handler: "
1117 "failed to connect netlogon pipe: %s\n",
1118 nt_errstr(result
)));
1122 result
= trust_pw_change(netlogon_creds_ctx
,
1124 netlogon_pipe
->binding_handle
,
1125 child
->domain
->name
,
1126 child
->domain
->dcname
,
1129 DEBUG(10, ("machine_password_change_handler: "
1130 "trust_pw_change returned %s\n",
1131 nt_errstr(result
)));
1133 if (NT_STATUS_EQUAL(result
, NT_STATUS_ACCESS_DENIED
) ) {
1134 DEBUG(3,("machine_password_change_handler: password set returned "
1135 "ACCESS_DENIED. Maybe the trust account "
1136 "password was changed and we didn't know it. "
1137 "Killing connections to domain %s\n",
1138 child
->domain
->name
));
1139 invalidate_cm_connection(child
->domain
);
1142 if (!calculate_next_machine_pwd_change(child
->domain
->name
,
1144 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
1148 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
1149 timeval_string(talloc_tos(), &next_change
, false)));
1151 if (!NT_STATUS_IS_OK(result
)) {
1154 * In case of failure, give the DC a minute to recover
1156 tmp
= timeval_current_ofs(60, 0);
1157 next_change
= timeval_max(&next_change
, &tmp
);
1161 child
->machine_password_change_event
= tevent_add_timer(server_event_context(), NULL
,
1163 machine_password_change_handler
,
1167 /* Deal with a request to go offline. */
1169 static void child_msg_offline(struct messaging_context
*msg
,
1172 struct server_id server_id
,
1175 struct winbindd_domain
*domain
;
1176 struct winbindd_domain
*primary_domain
= NULL
;
1177 const char *domainname
= (const char *)data
->data
;
1179 if (data
->data
== NULL
|| data
->length
== 0) {
1183 DEBUG(5,("child_msg_offline received for domain %s.\n", domainname
));
1185 if (!lp_winbind_offline_logon()) {
1186 DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
1190 primary_domain
= find_our_domain();
1192 /* Mark the requested domain offline. */
1194 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
1195 if (domain
->internal
) {
1198 if (strequal(domain
->name
, domainname
)) {
1199 DEBUG(5,("child_msg_offline: marking %s offline.\n", domain
->name
));
1200 set_domain_offline(domain
);
1201 /* we are in the trusted domain, set the primary domain
1203 if (domain
!= primary_domain
) {
1204 set_domain_offline(primary_domain
);
1210 /* Deal with a request to go online. */
1212 static void child_msg_online(struct messaging_context
*msg
,
1215 struct server_id server_id
,
1218 struct winbindd_domain
*domain
;
1219 struct winbindd_domain
*primary_domain
= NULL
;
1220 const char *domainname
= (const char *)data
->data
;
1222 if (data
->data
== NULL
|| data
->length
== 0) {
1226 DEBUG(5,("child_msg_online received for domain %s.\n", domainname
));
1228 if (!lp_winbind_offline_logon()) {
1229 DEBUG(10,("child_msg_online: rejecting online message.\n"));
1233 primary_domain
= find_our_domain();
1235 /* Set our global state as online. */
1236 set_global_winbindd_state_online();
1238 /* Try and mark everything online - delete any negative cache entries
1239 to force a reconnect now. */
1241 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
1242 if (domain
->internal
) {
1245 if (strequal(domain
->name
, domainname
)) {
1246 DEBUG(5,("child_msg_online: requesting %s to go online.\n", domain
->name
));
1247 winbindd_flush_negative_conn_cache(domain
);
1248 set_domain_online_request(domain
);
1250 /* we can be in trusted domain, which will contact primary domain
1251 * we have to bring primary domain online in trusted domain process
1252 * see, winbindd_dual_pam_auth() --> winbindd_dual_pam_auth_samlogon()
1253 * --> contact_domain = find_our_domain()
1255 if (domain
!= primary_domain
) {
1256 winbindd_flush_negative_conn_cache(primary_domain
);
1257 set_domain_online_request(primary_domain
);
1263 static void child_msg_dump_event_list(struct messaging_context
*msg
,
1266 struct server_id server_id
,
1269 DEBUG(5,("child_msg_dump_event_list received\n"));
1270 DBG_WARNING("dump_event_list no longer implemented\n");
1273 NTSTATUS
winbindd_reinit_after_fork(const struct winbindd_child
*myself
,
1274 const char *logfilename
)
1276 struct winbindd_domain
*domain
;
1277 struct winbindd_child
*cl
;
1280 status
= reinit_after_fork(
1281 server_messaging_context(),
1282 server_event_context(),
1284 if (!NT_STATUS_IS_OK(status
)) {
1285 DEBUG(0,("reinit_after_fork() failed\n"));
1289 close_conns_after_fork();
1291 if (!override_logfile
&& logfilename
) {
1292 lp_set_logfile(logfilename
);
1296 if (!winbindd_setup_sig_term_handler(false))
1297 return NT_STATUS_NO_MEMORY
;
1298 if (!winbindd_setup_sig_hup_handler(override_logfile
? NULL
:
1300 return NT_STATUS_NO_MEMORY
;
1302 /* Stop zombies in children */
1305 /* Don't handle the same messages as our parent. */
1306 messaging_deregister(server_messaging_context(),
1307 MSG_SMB_CONF_UPDATED
, NULL
);
1308 messaging_deregister(server_messaging_context(),
1309 MSG_SHUTDOWN
, NULL
);
1310 messaging_deregister(server_messaging_context(),
1311 MSG_WINBIND_OFFLINE
, NULL
);
1312 messaging_deregister(server_messaging_context(),
1313 MSG_WINBIND_ONLINE
, NULL
);
1314 messaging_deregister(server_messaging_context(),
1315 MSG_WINBIND_ONLINESTATUS
, NULL
);
1316 messaging_deregister(server_messaging_context(),
1317 MSG_DUMP_EVENT_LIST
, NULL
);
1318 messaging_deregister(server_messaging_context(),
1319 MSG_WINBIND_DUMP_DOMAIN_LIST
, NULL
);
1320 messaging_deregister(server_messaging_context(),
1323 messaging_deregister(server_messaging_context(),
1324 MSG_WINBIND_DOMAIN_OFFLINE
, NULL
);
1325 messaging_deregister(server_messaging_context(),
1326 MSG_WINBIND_DOMAIN_ONLINE
, NULL
);
1328 /* We have destroyed all events in the winbindd_event_context
1329 * in reinit_after_fork(), so clean out all possible pending
1330 * event pointers. */
1332 /* Deal with check_online_events. */
1334 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
1335 TALLOC_FREE(domain
->check_online_event
);
1338 /* Ensure we're not handling a credential cache event inherited
1339 * from our parent. */
1341 ccache_remove_all_after_fork();
1343 /* Destroy all possible events in child list. */
1344 for (cl
= winbindd_children
; cl
!= NULL
; cl
= cl
->next
) {
1345 TALLOC_FREE(cl
->lockout_policy_event
);
1346 TALLOC_FREE(cl
->machine_password_change_event
);
1348 /* Children should never be able to send
1349 * each other messages, all messages must
1350 * go through the parent.
1355 * Close service sockets to all other children
1357 if ((cl
!= myself
) && (cl
->sock
!= -1)) {
1363 * This is a little tricky, children must not
1364 * send an MSG_WINBIND_ONLINE message to idmap_child().
1365 * If we are in a child of our primary domain or
1366 * in the process created by fork_child_dc_connect(),
1367 * and the primary domain cannot go online,
1368 * fork_child_dc_connection() sends MSG_WINBIND_ONLINE
1369 * periodically to idmap_child().
1371 * The sequence is, fork_child_dc_connect() ---> getdcs() --->
1372 * get_dc_name_via_netlogon() ---> cm_connect_netlogon()
1373 * ---> init_dc_connection() ---> cm_open_connection --->
1374 * set_domain_online(), sends MSG_WINBIND_ONLINE to
1375 * idmap_child(). Disallow children sending messages
1376 * to each other, all messages must go through the parent.
1381 return NT_STATUS_OK
;
1385 * In a child there will be only one domain, reference that here.
1387 static struct winbindd_domain
*child_domain
;
1389 struct winbindd_domain
*wb_child_domain(void)
1391 return child_domain
;
1394 struct child_handler_state
{
1395 struct winbindd_child
*child
;
1396 struct winbindd_cli_state cli
;
1399 static void child_handler(struct tevent_context
*ev
, struct tevent_fd
*fde
,
1400 uint16_t flags
, void *private_data
)
1402 struct child_handler_state
*state
=
1403 (struct child_handler_state
*)private_data
;
1406 /* fetch a request from the main daemon */
1407 status
= child_read_request(state
->cli
.sock
, state
->cli
.request
);
1409 if (!NT_STATUS_IS_OK(status
)) {
1410 /* we lost contact with our parent */
1414 DEBUG(4,("child daemon request %d\n",
1415 (int)state
->cli
.request
->cmd
));
1417 ZERO_STRUCTP(state
->cli
.response
);
1418 state
->cli
.request
->null_term
= '\0';
1419 state
->cli
.mem_ctx
= talloc_tos();
1420 child_process_request(state
->child
, &state
->cli
);
1422 DEBUG(4, ("Finished processing child request %d\n",
1423 (int)state
->cli
.request
->cmd
));
1425 SAFE_FREE(state
->cli
.request
->extra_data
.data
);
1427 status
= child_write_response(state
->cli
.sock
, state
->cli
.response
);
1428 if (!NT_STATUS_IS_OK(status
)) {
1433 static bool fork_domain_child(struct winbindd_child
*child
)
1436 struct child_handler_state state
;
1437 struct winbindd_request request
;
1438 struct winbindd_response response
;
1439 struct winbindd_domain
*primary_domain
= NULL
;
1442 struct tevent_fd
*fde
;
1444 if (child
->domain
) {
1445 DEBUG(10, ("fork_domain_child called for domain '%s'\n",
1446 child
->domain
->name
));
1448 DEBUG(10, ("fork_domain_child called without domain.\n"));
1451 if (socketpair(AF_UNIX
, SOCK_STREAM
, 0, fdpair
) != 0) {
1452 DEBUG(0, ("Could not open child pipe: %s\n",
1458 state
.child
= child
;
1459 state
.cli
.pid
= getpid();
1460 state
.cli
.request
= &request
;
1461 state
.cli
.response
= &response
;
1463 child
->pid
= fork();
1465 if (child
->pid
== -1) {
1466 DEBUG(0, ("Could not fork: %s\n", strerror(errno
)));
1472 if (child
->pid
!= 0) {
1478 nread
= sys_read(fdpair
[1], &status
, sizeof(status
));
1479 if (nread
!= sizeof(status
)) {
1480 DEBUG(1, ("fork_domain_child: Could not read child status: "
1481 "nread=%d, error=%s\n", (int)nread
,
1486 if (!NT_STATUS_IS_OK(status
)) {
1487 DEBUG(1, ("fork_domain_child: Child status is %s\n",
1488 nt_errstr(status
)));
1493 child
->next
= child
->prev
= NULL
;
1494 DLIST_ADD(winbindd_children
, child
);
1495 child
->sock
= fdpair
[1];
1500 child_domain
= child
->domain
;
1502 DEBUG(10, ("Child process %d\n", (int)getpid()));
1504 state
.cli
.sock
= fdpair
[0];
1507 status
= winbindd_reinit_after_fork(child
, child
->logfilename
);
1509 nwritten
= sys_write(state
.cli
.sock
, &status
, sizeof(status
));
1510 if (nwritten
!= sizeof(status
)) {
1511 DEBUG(1, ("fork_domain_child: Could not write status: "
1512 "nwritten=%d, error=%s\n", (int)nwritten
,
1516 if (!NT_STATUS_IS_OK(status
)) {
1517 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
1518 nt_errstr(status
)));
1522 if (child_domain
!= NULL
) {
1523 setproctitle("domain child [%s]", child_domain
->name
);
1524 } else if (child
== idmap_child()) {
1525 setproctitle("idmap child");
1528 /* Handle online/offline messages. */
1529 messaging_register(server_messaging_context(), NULL
,
1530 MSG_WINBIND_OFFLINE
, child_msg_offline
);
1531 messaging_register(server_messaging_context(), NULL
,
1532 MSG_WINBIND_ONLINE
, child_msg_online
);
1533 messaging_register(server_messaging_context(), NULL
,
1534 MSG_DUMP_EVENT_LIST
, child_msg_dump_event_list
);
1535 messaging_register(server_messaging_context(), NULL
,
1536 MSG_DEBUG
, debug_message
);
1537 messaging_register(server_messaging_context(), NULL
,
1538 MSG_WINBIND_IP_DROPPED
,
1539 winbind_msg_ip_dropped
);
1542 primary_domain
= find_our_domain();
1544 if (primary_domain
== NULL
) {
1545 smb_panic("no primary domain found");
1548 /* It doesn't matter if we allow cache login,
1549 * try to bring domain online after fork. */
1550 if ( child
->domain
) {
1551 child
->domain
->startup
= True
;
1552 child
->domain
->startup_time
= time_mono(NULL
);
1553 /* we can be in primary domain or in trusted domain
1554 * If we are in trusted domain, set the primary domain
1555 * in start-up mode */
1556 if (!(child
->domain
->internal
)) {
1557 set_domain_online_request(child
->domain
);
1558 if (!(child
->domain
->primary
)) {
1559 primary_domain
->startup
= True
;
1560 primary_domain
->startup_time
= time_mono(NULL
);
1561 set_domain_online_request(primary_domain
);
1567 * We are in idmap child, make sure that we set the
1568 * check_online_event to bring primary domain online.
1570 if (child
== idmap_child()) {
1571 set_domain_online_request(primary_domain
);
1574 /* We might be in the idmap child...*/
1575 if (child
->domain
&& !(child
->domain
->internal
) &&
1576 lp_winbind_offline_logon()) {
1578 set_domain_online_request(child
->domain
);
1580 if (primary_domain
&& (primary_domain
!= child
->domain
)) {
1581 /* We need to talk to the primary
1582 * domain as well as the trusted
1583 * domain inside a trusted domain
1586 * set_dc_type_and_flags_trustinfo()
1589 set_domain_online_request(primary_domain
);
1592 child
->lockout_policy_event
= tevent_add_timer(
1593 server_event_context(), NULL
, timeval_zero(),
1594 account_lockout_policy_handler
,
1598 if (child
->domain
&& child
->domain
->primary
&&
1599 !USE_KERBEROS_KEYTAB
&&
1600 lp_server_role() == ROLE_DOMAIN_MEMBER
) {
1602 struct timeval next_change
;
1604 if (calculate_next_machine_pwd_change(child
->domain
->name
,
1606 child
->machine_password_change_event
= tevent_add_timer(
1607 server_event_context(), NULL
, next_change
,
1608 machine_password_change_handler
,
1613 fde
= tevent_add_fd(server_event_context(), NULL
, state
.cli
.sock
,
1614 TEVENT_FD_READ
, child_handler
, &state
);
1616 DEBUG(1, ("tevent_add_fd failed\n"));
1623 TALLOC_CTX
*frame
= talloc_stackframe();
1625 ret
= tevent_loop_once(server_event_context());
1627 DEBUG(1, ("tevent_loop_once failed: %s\n",
1632 if (child
->domain
&& child
->domain
->startup
&&
1633 (time_mono(NULL
) > child
->domain
->startup_time
+ 30)) {
1634 /* No longer in "startup" mode. */
1635 DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
1636 child
->domain
->name
));
1637 child
->domain
->startup
= False
;
1644 void winbind_msg_ip_dropped_parent(struct messaging_context
*msg_ctx
,
1647 struct server_id server_id
,
1650 struct winbindd_child
*child
;
1652 winbind_msg_ip_dropped(msg_ctx
, private_data
, msg_type
,
1656 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
1657 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
1658 msg_type
, data
->data
, data
->length
);